In a study designed to test the effectiveness of acupuncture for

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In a study designed to test the effectiveness of acupuncture for treating migraine, 95 individuals were treated with acupuncture and 80 individuals were given a sham treatment. The numbers of migraine attacks for the acupuncture treatment group has a mean of 1.8 and a standard deviation of 1.4. The number of migraine attacks for the sham treatment group has a mean of 1.6 and a standard deviation of 1.2

a)Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.

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b)Construct the 95% confidence interval estimate of the mean number of migraine attacks for those given a sham treatment.


c)Compare the two confidence intervals. What would the results suggest about the effectiveness of acupuncture?